Mixing device



Dfwn 6,1932.

WWI /H Patented Dee. e, 1932 riuirsn'srerss Parmi 13. sHArLER Annan-amr r. TRQENDLY, or emcA'eo, rumors, Assrenonsfro THEWM. D. meson COMPANY, or onrcnso, rLLNos', A c'ORPcnarror oEiLLINoIs i Mixiive DEVICE Appneatiea flies .May y1i,

This invention relates toa mixing` device and has special .referencefto a drink mixer whichis. hand operated to provide a verti- 1 cally reciprocal motion ,to a -dasher` for aerat-4 ing 'and violently agitating a solution in an.'`

enclosed receptacle.- Q t A. -f q -More particularly, this invention relates to a miXin device com risin@r Van o ento re-V ceptacle preferably of glass having a ,cover for enclosing the same, the cover providing a bearingjfor a dasher shaft extending therethrough forV vertically reciprocal motion and the shaft supporting a `perforated conical flasher within thereceptacle...

# The above elements vices now on the market, which latter,how ever, are objectionable in that some of the liquid isdisplaced from the receptacl through the opening for the dasher shaft and through the seal between the coverV and the receptacle. The liquid thus dissipated flows over the outer sides ofthe receptacle v to soil thek hands of the operator and to leave a ringor other unsightly appearanceonthe table 'or other support therefor. Treinendous` sales resistance is caused by these objectionable features in an otherwise very useful Vhousehold utensil.. v Y v It is` the contemplation of the present invention to eliminate the Vabove noted objec-y tionable features by so constructing the bushing as to wipethe shaft substantially free from liquid on its upwardstroke. Also, an

efficientl seal is provided by means of slightly tapering the peripheral cover engaging edge of the receptacle.

This' invention further kcontemplates the improvement of the conicaldasher by providing aseries V,of radial slots extending a sub- 50 to the surface ofthe solution and forces the Y Y broadly considered' are common to a particular class of mining de 192.1.` serial No. 536,338.

same to the bottom o f releasing'.

thereceptacle befOIe l r' ,It is ,further Vcontem'plate*d toprovide"Tafi.` dasher iny which Vthe correctfrelation jof the Y area ofthe slots'with thev cross-sectional--area y oi me receptacle isobtained whereby the op- Y eratoiimay force the 'solution through the` slots at a veryhigh andeicient velocity,

`One of; the objects of -this invention is V to provide a mixing device ofthe type herein ce f' before, referred to y,which is inexpensive to..4

manufacture, is eflicient in operation and is,

durable..

, Another object of `this inventionis to pro-1 i vide a device of thecharacter noted above in whichv the solution is effectivelysealed withinvf the container. i v Y A further object of this inventionis toprlovvide a mixingdevice of the type above pointed outin which'the dasher thereof will effectively agitate and aerate the solution.

f Other objects and advantages will here-ji.`

inafter be4 morefully pointed out andrfor` a more complete understanding of .the charac? teristlc features of this lnventlon reference,

may now be hadto the following description when taken together withy the accompanying drawing, in which latter: "f j. A y .y Figure 1- isacentralsectional -view of the. device of this invention A Fig.` 2`is a'fragmentary enlarged view of a portion of the cap and-the receptacle-showy ing the engaging or sealing relation therebei` tween; d y. Y Y y Fig. Sis a central sectional viewV of the bushing for the agitating shaft; and .d

Fig. 4 is a fragmentary sectional view of a j modified form of bearing'forthe` agitating' shaft.

. Referring now more'. particularly..toflthe eo drawing, the device ofthisinvention prefer-` f ably comprises an open-top taperedrecepf'v a sheet metal stamped cover'llrfor enclosing thefopen top. Although a( glass receptacle tacle l() preferably formed ,of glass havingl is preferable it will be ,understoo'dfthat af receptacle of any suitable material lmay ,be

employed in lieu thereof. The coverA ispreferably provided with. a bushings 12 Jthrough y* which a dasher shaft 13-V eXtends and The upper end ofthe dasher shaft is prefershaft is vertically reciprocated therethrough.

ably Ybent to forma handle le, the lower end thereof passing through a hole 15 in the upper end of dasher 16. A securing relation ben tween the dasher 'and dasher shaft is providedfas by meansof spotvwelding the lower end of the's'haft to the material adjacent la hole in `a Vraised portion at vthe apex ofthe ffl preferably 'coneshaped' daslierv v K 16` through whichh'ole the shafteXtends. i c VThe dasher 16 is preferably made inthe Qfor'n'i of a lsi'ribstantially conical shell having fan apron extendingangularly from the pe# ripheral base thereof kand is provided with a series of radial slots-'18 extending `preferably `from theouter 'periphery thereof a -substan 'l tial distance-inwardlytherefrom. It is also j to be noted that the slots need not be extend f ed-'tofthe peripheral edge' butmay b-e'wholl'yinternal'y of the lshell 'withjeifective results.` Inlorderto operate efliciently,` the slots 18 Y should have'a fixed area with respect to the Y totalcross-sectionallarea of the receptacle the action of which tal plane Vif beams of light camev from infinite distances vertically above theslot; g

so'as to'force the solution through the slots at-f-afhigh velocity during Vthe reciprocationYV of thedasher at a normal speed of operation. This ratio has been determined byfrelating the-vertically vprojected area to an average Y, cross-sectional area'since the'side'wallof the receptacle is shown-as being tapered'.Y` It is, of course, to be understood that the sidewall of'thereceptacle maybe vertical or'shaped in any manner desired. By"vertically pro- "jected areav is meant the edective'area avail? able foriverti'cally rising liquid inthe receptacle-whieh is equivalent to the sum of the shadows which the slotsvcast on a horizon-l AThef area of* they lslots-which have been Y foundl tobe moreparticularly desirable rep-v resent a vertically projected area of approximately 41%: 7o of Y"ther total average area of "the receptacle. From a4 practical standpoint, the area of the slots should be 'maintained between*lj1/2% ,and 13% of the Yaverage area oftheglass for effectiveresults. Inasmuch asv the upper end of the conical shell is enclosed and the slots 18' do'not extend the full length of the side walls, an air trap' 19v is provided, l Y Y will .be hereinafter more fullyexplained.' 'i I 4 lVliXing devices of the type herein described" have been quiteobjectionable in that the soluti'ontowbe mixed therein may be readily dis-Y Y Y placed from the receptacle through the openf ing ',at the bearing throughwhich the dasher shaft"13Yis-reciprocatedfV The present inventiongcontemplates the provision of a memberf preferably extending' jinwardly I toward the Yreceptacle*which' wea'maycall a reeritrant` f member-which will actas a bearing forguidving;theydasher'shaft'13,the bushing being i in the shape of' zin-inverted"substantially coni# cal shell having a very small shaftiengaging v portion 2O to reduce to a minimum friction 'between the shaft and the bushing and to provide by reason of the taperedy wall 21 on the outside*y of the shell a sharp edge 22to sharp edge22 on the upward movement'of the shaft and wh'enfa sufficient amount forms e at lthe lower vend `of the shell it is drained Vvback into the receptacle; 'As' a precautionary measure, by reason of the bushingbeing a shell Vof a 'substantially-conicalfshapa a receiving Vcup 23 provided between the innert -wall lof theshell p andthe vertical shaftto' collect anyf-moisture that -maybecome displaced from the receptacle;n In'theevent thatL a small amount of .solution may becomedis-I` placed .from` the receptacle intofthe receiving cup,v that amount would: befcarried back intov the shell bythesuction created by the dasherj on the downward movementjof Ythe shaft 13! ed; Y

and consequently lthe'- solution would Vvnot be i permitted to escape from the cup QS'overfonf V- to the cover 11.'-

saine 'depth as the thickness-ofthe cover"11' engagingv therewith; V,The 'cover 11' is 'prefer ably of an inverted cup-shape having a'augef 25 of substantially the -sa'me'height as the heightof the recess'Qe` in-which 'it' engages- The flange, it will be noted, is merely a con Vtinuation at aslight angleof-the main body portion of thecover andcontains lno-'beaidingv or similar portion for the vpurpose ofA rigidity",`

since it is desired thatthe-cover Abe ofthe Aut# ln order to seal completely the solution to" be mixed withinlthe receptacle, the upperend ofthe receptacle `1Ois provided withg'a circularf recess 2l prefer-ably of substantially "ther most flexibility; L For-want offa'better--ter-mi and .to eliminate theu'se'of negative-'limita-= t1ons, the cup-shaped'coverwill hereinafter be referred to as having substantially",straight side walls'and intheuse of this terminology the use of expressions suchasnothavingaaY bead-'or other vreinforcing portionwill -bex avoided.4 The inner `recessed wallof the' re-` ceptacle convergesinwardly from a "pointsubstantially midway of the height, thereof, tj Y a radial portion forming a shoulder withfthe inside taperedwall of thefreceptacle to vre@- ceive *inV sealed-'engagement 1 therewith ftheouter wallvofthe flange flroffthel `cover 11 which effectively prevents a 4dissipationf'of the solution outside ofA the receptaclel jat, this point. Alt has been found that thelwajllof this circular recessatthe top'of the 'receptacle 10 may taper about kone degree from thefver-`v i ti'c'alto engageV the vertically extendingl flange 25,although`thellaterhasbeen foundltoFgi-ver ik elfe'ctilveresults by tapering ina-direction op?. v K posite to `that lof'the f'Wa'll-lof the freceptacle 130 about one degree. VIt is, of course, to beunder`- i v` obtained and the contour maybe slightly oval shaped or the diameter may vary to some` degree. lThe construction Vof the present invention accommodates these variances by reason `partly of the resiliency of the cap and partly by the tapered engaging edge or edges. It is also particularly pointed out that the seal between the cap and receptacle is effected within the container as differenti-v Y ated from av seal as usually provided in arti;`

cles of this character outside of the recep tacle.

In the operation of the device, the dasher shaft is vigorously reciprocated Vwhereby the solution in the receptacle is agitated and aerated and thereby caused to have a frothy appearance due `to the tiny voids created in the solution. The appearance ofthe solutionl is particularly inviting to the eye andthe frothy aerated mixture has been found to'be more palatable. On the. downward stroke of the dasher, air is trapped in the chamber 19 thereof and is carried down to the bottom of the receptacle where it is released therein on 2 the upward stroke of the dasher. Aircontiguous to the surface of the liquid, of course, is forced into the liquid atthe top of the receptacle in the same manner and a substantial supply of air is thereby passed into the s solution. Also, the downward stroke of the dasher setsV up a circulatory movement in one, direction which is broken up byV a movement of the dasher in the opposite direction setting up a second circulatory movement-'of l the liquid. The mixing of the solution and the aerating thereof is augmented by the series of radial slots onthedasher through which the liquid must pass at a very high velocity due particularly to `the relations of theareas of the slots and the cross-sectional area of the receptacle. The various circulatory movementsof the liquid together with the violent agitation thereof and the Vtrapping of the air by the dasher further provides effective mixing. and -aerating of the solution.

The receptacle Vl0 has been described as being preferably formed of glass' for the rea# son that it can be easily kept clean and is not liable. to rust or become oxidized or have the cated. The other elements of the construc- We claim:

tion maybe plated with a non-corrosivesubstance." f 'i i VjReferringnow particularly to 4l 'ofL .tl-1e', drawings,i'fa sheet v`metalstamped f cover shown therein is'o'f thesame form in all respects to that previously recited with'thej 'zuA exception that instead of a r separatereentrant member the material adjacent the open? ing in the cover throughwhi-ch the shaft exf` tends is formedinto a reentrant substantially conical shell 26 having al small bearing portion- 27` engagingthe dasher shaft'.` ,A

sharp edgeQS is -preferablyprovided at the Y I small end of theconical shell for wiping or Y preventing creeping of the Vsolution from "thel shaft'iout of the receptacle asin the' previous modification.

The large end of the shell?" provides arcup portion 29 on theinner side thereof which may receive` any liquid displaced from the container, such rliquid being" carriedbaclr into thev shell" bythe suction created by the dasher'on the downward inove-` y ment ofthe dasher shaft'. g v f 4While but two embodiments of tionv are herein' shown "and described, it is 'to be understood' that v'arioi'i's modifications thisI inventhereof may be'a'pparent' tofthose skilled in the lart without departing from the spirit andscope of this invention and, therefore, I

the' same are only to b'e'limited by thescope of the prior art and thefappended clairns.l

1. In afdevice of the class described, a l

verted relatively thin sheet metal cup-shaped cover` having substantially" straightside wallsfor` providing afdesiredffle'xibility in n rigid receptacle having an open top, an in- 1 verted relatively thin sheet metaly cup-shaped cover vhaving substantially straight side walls for providing a' desired flexibility in said cover, anv agitator shaft extending v through lsaid cover, and a dasher movable by said shaft to agitate afsolution inf said receptacle, the inner wall of said lreceptacle adjacent said open top converging inwardly to van arcuate portion forming Aa shoulder with the inside wall ofsaid receptacle to re# ceive in sealed engagement therewith the peripheral. wall of said cover to prevent a displacement of said solutionoutside of said. receptacle. 1

3. In a device of the Vclass describechttv ,i rigidreceptaclehavinganiopenwtopf;an in- V if Y verted relatively thin sheet metal cup-shaped cover having; Substantially! straight 4,side

rectifonf: f A l c 4'., In. av device ofA the* clavssfrdescribed, yav 'g rigid receptacle having anf!opent0p, an'in-fV v 20; vverted relatively thin sheet metal cup-shapedside ofvsaid receptacle.

walls: lorprovidingl aA-desired yiexibilityin said cover, said coverhaving, Va, reentrant. substanf-g ftially'jcon'ical shell onproviding a bearing,l an agitatorjsh-aft Vextending through said. bearing of saidcover, and a dasher movable. by said shaft lto agita-ue a solution ineaidv ,i

receptacle,- the inner wall of said receptacle adjacent said-open topfreceiving in sealed i Y engagement-therewiththe-peripheral*wall ofsaid cover to,preventa'displacement of saidV solution outside of said receptacle, thewalls Y of said receptacle converging in one direction.

and said cover,= converging in an opposite di'- cover i having f 1 substantially straight side walls for `providing'v a ldesired flexibility in said*l cover, an agitator/shaft extending;f vthrough 'sa1dcover, vand a dasherr'movable l byfsaid shaftto agitate a Vsolution in said receptacle, Athe inner wall-of said-receptacle adjacentfsaid openftop converging inwardly r to receivejin sealedjengagemen-t therewith'an outwardly convergingl wall of. said cover' to Yprevenca displacementof said solution ont;-l

5. Adasher for reciprocal movement in a v receptacle comprisingfa substantially conical shell havinganapron* extending angularly from, the; peripheral 'base `thereof, said-'shell having afprlurality of radialslots extendingV from thef'outeredge thereof vSubstantially irl-- wardly 'therefrom and beinggenclosed Aat the apex thereofto'provide an air trap. n Inwitness whereof, we have hereunto subscribed ournames. Y v

PHILIP B. SHAILER.

HARRY rf JrROEivDLY.

Y escaso-'zi' 

